Hydrogen-3

Hydrogen-3
Cgommel · CC BY-SA 2.0 de · source
Name	Hydrogen-3
Other names	Tritium
Discovery	Ernest Rutherford, Mark Oliphant, Paul Harteck
Discovered place	Cavendish Laboratory
Decay mode	Beta decay
Half life	12.32 years

Hydrogen-3

Introduction

Hydrogen-3 is a radioactive isotope historically associated with nuclear research by Ernest Rutherford, Mark Oliphant, and Paul Harteck at the Cavendish Laboratory and later developed in contexts involving the Manhattan Project, Lawrence Livermore National Laboratory, and Oak Ridge National Laboratory. It appears in technical literature alongside isotopes studied at institutions such as Los Alamos National Laboratory, Argonne National Laboratory, and Brookhaven National Laboratory, and it figures in treaties and discussions involving Partial Test Ban Treaty, Comprehensive Nuclear-Test-Ban Treaty, and agencies like the International Atomic Energy Agency. The isotope has influenced programs at universities including Massachusetts Institute of Technology, University of California, Berkeley, and University of Cambridge and has been referenced in industrial contexts involving firms such as Westinghouse Electric Company, General Electric, and Rolls-Royce plc.

Nomenclature and basic properties

Nomenclature for this isotope includes the name used by the International Union of Pure and Applied Chemistry, the symbol adopted in databases curated by organizations like National Institute of Standards and Technology and International Atomic Energy Agency, and terminology appearing in standards from American National Standards Institute and International Organization for Standardization. Its labeling appears alongside isotopic tables maintained by Royal Society of Chemistry, American Chemical Society, and textbooks from Oxford University Press, Cambridge University Press, and Springer Nature. Descriptive entries reference historical reports from Proceedings of the Royal Society, patents filed with offices such as the United States Patent and Trademark Office and regulations issued by United States Nuclear Regulatory Commission and Environmental Protection Agency.

Production and sources

Primary production pathways are described in reports from Los Alamos National Laboratory, Oak Ridge National Laboratory, and reactor operations at facilities like Hanford Site, Sellafield, and La Hague. Cosmogenic production in the upper atmosphere is modeled by collaborations involving NASA, European Space Agency, and National Oceanic and Atmospheric Administration, and measurements have been reported by teams from Scripps Institution of Oceanography and Lamont–Doherty Earth Observatory. Reactor and accelerator production is documented by companies such as Westinghouse Electric Company and facilities like CERN and Brookhaven National Laboratory, while military production histories involve programs at Los Alamos National Laboratory and Lawrence Livermore National Laboratory.

Physical and nuclear properties

Nuclear decay characteristics are detailed in compilations by National Nuclear Data Center, International Atomic Energy Agency, and the Nuclear Regulatory Commission, and are compared with data for other nuclides in resources from NIST and IAEA. Its beta decay to helium-3 is described in nuclear physics texts used at Princeton University, California Institute of Technology, and Massachusetts Institute of Technology, with theoretical treatments referencing work by Enrico Fermi and later developments at CERN and Fermilab. Cross sections for production and interaction are studied in programs at Brookhaven National Laboratory, Argonne National Laboratory, and Oak Ridge National Laboratory.

Applications and uses

Applications appear across fields represented by institutions such as Lockheed Martin, Raytheon Technologies, and Northrop Grumman for defense-related uses, and by Illuminating Engineering Society standards and manufacturers such as GE Lighting for luminous devices. Scientific uses have been developed at Scripps Institution of Oceanography, Woods Hole Oceanographic Institution, and Lawrence Berkeley National Laboratory for tracer studies in hydrology, oceanography, and climate research. Fusion research programs at ITER, National Ignition Facility, and Princeton Plasma Physics Laboratory cite its role in fusion fuel cycles, while precision devices and calibration standards reference vendors and labs like Sandia National Laboratories and NIST.

Environmental and health effects

Environmental pathways and monitoring have been addressed by Environmental Protection Agency, United Kingdom Environment Agency, and Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail in reports examining releases from sites such as Sellafield, Hanford Site, and La Hague. Health guidance appears in documents from World Health Organization, Centers for Disease Control and Prevention, and United Nations Scientific Committee on the Effects of Atomic Radiation, and has informed regulations by the Nuclear Regulatory Commission and national ministries such as Ministry of Health (France). Epidemiological and radiobiological studies have been conducted by teams affiliated with Harvard University, Johns Hopkins University, and Karolinska Institutet.

Detection, measurement, and handling

Analytical methods are standardized in protocols from National Institute of Standards and Technology, International Atomic Energy Agency, and laboratories at Lawrence Livermore National Laboratory, Brookhaven National Laboratory, and Argonne National Laboratory. Detection techniques are used in environmental monitoring programs run by Environmental Protection Agency, UK Met Office, and Norwegian Radiation and Nuclear Safety Authority, and instrumentation is supplied by companies such as Thermo Fisher Scientific, PerkinElmer, and Canberra Industries. Handling, transport, and storage procedures follow guidelines from International Atomic Energy Agency, Department of Energy (United States), and United Nations Office for Disarmament Affairs.

Category:Isotopes of hydrogen